Java 时间相减

package com.java.page;

import java.text.SimpleDateFormat;
import java.util.Date;


public class Student {
	
	public  static void main(String args[])throws Exception{
		Date date=new Date();
		SimpleDateFormat sdf=new SimpleDateFormat("yyyy:MM:dd HH:mm:ss");
		String ding="2011:05:29 21:52:00";
		Date show=sdf.parse(ding);
		if((date.getTime()-show.getTime())>120000){
			System.out.println("现在大");
		}else{
			System.out.println("现在小");
		}
	}

}